I recently adopted a pair of what I am fairly sure are yellow bellied sliders. They are about 2 inches and 3 inches. A friend of mine daughter bought them, and then left her to take care of them. She had more than enough on her plate, so with no knowledge I volunteered.

They were in a 10 gallon tank with loads of decorative gravel on the bottom. STINKY!!! I did some research, and bought a 30 gallon tub for them. Ditched the substrate. Funds are short right now, so I am only running a Zoomed Turtle Clean 501. which I know isn't big enough, so I do partial water changes a lot. They have a heat lamp and UVB lamp and also a submersible Tetra water heater. I've been feeding them Reptomin sticks as well as leafy greens like Dandelion Greens and Romaine Lettuce. Discovered they are fiends for corn nuggets (to much sugar?). I also bought them a Calci-Treat which they seem to like to nibble on.
Since their move from the cramped 10 gallon they are a thousand times more active and seem pretty happy. Never knew turtles were beggars. LOL!! At least they can't wake me up at 4 AM like the cats do.
Since the move though, they don't bask as much. Is this OK?
Is 30 gallons enough for their size right now? What filter should I be looking for next? In doing research, many seem to say canister. Seems Fluval is up there. Is that what I should get next? What else should I be doing for them?
Sorry for all the questions, but I wanna do right by them, and am already quite attached to them.
